3996649843 has 2 divisors, whose sum is σ = 3996649844. Its totient is φ = 3996649842.

The previous prime is 3996649807. The next prime is 3996649847. The reversal of 3996649843 is 3489466993.

3996649843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3996649843 - 2²¹ = 3994552691 is a prime.

It is not a weakly prime, because it can be changed into another prime (3996649847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998324921 + 1998324922.

It is an arithmetic number, because the mean of its divisors is an integer number (1998324922).

Almost surely, 2^3996649843 is an apocalyptic number.

3996649843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996649843 is an equidigital number, since it uses as much as digits as its factorization.

3996649843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 61.

The square root of 3996649843 is about 63219.0623388231. The cubic root of 3996649843 is about 1586.9577579576.

The spelling of 3996649843 in words is "three billion, nine hundred ninety-six million, six hundred forty-nine thousand, eight hundred forty-three".